blob: 7e6db3cf46f9eb39746fcc4ac4b4e29296caa569 [file] [log] [blame]
Christian Ohm41de3262013-05-21 01:31:08 +02001/*
2 * HID driver for Holtek gaming mice
3 * Copyright (c) 2013 Christian Ohm
4 * Heavily inspired by various other HID drivers that adjust the report
5 * descriptor.
6*/
7
8/*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 */
14
15#include <linux/hid.h>
16#include <linux/module.h>
17#include <linux/usb.h>
18
19#include "hid-ids.h"
20
21/*
22 * The report descriptor of some Holtek based gaming mice specifies an
23 * excessively large number of consumer usages (2^15), which is more than
24 * HID_MAX_USAGES. This prevents proper parsing of the report descriptor.
25 *
Christian Ohmd4f51892013-05-21 01:31:09 +020026 * This driver fixes the report descriptor for:
27 * - USB ID 04d9:a067, sold as Sharkoon Drakonia and Perixx MX-2000
28 * - USB ID 04d9:a04a, sold as Tracer Sniper TRM-503, NOVA Gaming Slider X200
29 * and Zalman ZM-GM1
Christian Ohm41de3262013-05-21 01:31:08 +020030 */
31
32static __u8 *holtek_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
33 unsigned int *rsize)
34{
35 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
36
37 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
38 /* Change usage maximum and logical maximum from 0x7fff to
39 * 0x2fff, so they don't exceed HID_MAX_USAGES */
Christian Ohmd4f51892013-05-21 01:31:09 +020040 switch (hdev->product) {
41 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
42 if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
43 && rdesc[120] == 0xff && rdesc[121] == 0x7f) {
44 hid_info(hdev, "Fixing up report descriptor\n");
45 rdesc[116] = rdesc[121] = 0x2f;
46 }
47 break;
48 case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
49 if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
50 && rdesc[111] == 0xff && rdesc[112] == 0x7f) {
51 hid_info(hdev, "Fixing up report descriptor\n");
52 rdesc[107] = rdesc[112] = 0x2f;
53 }
54 break;
Christian Ohm41de3262013-05-21 01:31:08 +020055 }
Christian Ohmd4f51892013-05-21 01:31:09 +020056
Christian Ohm41de3262013-05-21 01:31:08 +020057 }
58 return rdesc;
59}
60
61static const struct hid_device_id holtek_mouse_devices[] = {
62 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
63 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
Christian Ohmd4f51892013-05-21 01:31:09 +020064 { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
65 USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
Christian Ohm41de3262013-05-21 01:31:08 +020066 { }
67};
68MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);
69
70static struct hid_driver holtek_mouse_driver = {
71 .name = "holtek_mouse",
72 .id_table = holtek_mouse_devices,
73 .report_fixup = holtek_mouse_report_fixup,
74};
75
Wei Yongjunc99f8182013-05-29 18:09:22 +080076module_hid_driver(holtek_mouse_driver);
Christian Ohm41de3262013-05-21 01:31:08 +020077MODULE_LICENSE("GPL");